The Genuine BMW Tension Belt (Black) - 51479138216 is a high-quality replacement part for BMW vehicles. It is designed to provide the necessary tension for the engine's belts, ensuring proper operation and longevity of the vehicle. This tension belt is made from durable materials and is specifically designed to fit BMW models. It is a genuine OEM part, ensuring a perfect fit and reliable performance. The tension belt is black in color and has the part number 51479138216. It is a crucial component for the smooth operation of the engine and should be regularly checked and replaced if necessary.